package book;

public class ThreadGroupTest {

	public static void main(String[] args) {
		
		ThreadGroup group = new ThreadGroup("root组");
		System.out.println(group.activeGroupCount());
		System.out.println(group.getName());
		System.out.println(group.getParent().getName());
		System.out.println(group.getParent().getParent().getName());
		System.out.println(group.getParent().getParent().getParent());
	}
}
